BIONIC SHARK is a new breed of water toy that is super easy to operate and loads of fun. BIONIC SHARK has dual motor drive system and a bionic spine that creates a realistic swimming motion that looks like a real shark! BIONIC SHARK also features 2 speeds (slower speed for bathtub setting) and an "auto-pilot mode" that you can use to make the shark swim straight or a figure 8 just with a press of a button! not intended for use in salt water. Includes rechargeable LiPo battery (3.7V/350 mAh), USB charging plug, 2 replacement propellers and small screwdriver. Remote requires 2 """"AA"""" Batteries